Hillary Clinton’s favorability rating has hit a six-year low, according to a new Fox News poll.

At 49 percent, just under half of Americans view the former secretary of state favorably, while 45 percent see her unfavorably, the poll, released Thursday, said. This is the first time Clinton’s approval rating has fallen below 50 percent in a Fox survey since April 2008 — during the Democratic presidential primaries — when 47 percent viewed her favorably.

The poll’s results also mark a 7 percentage point drop within the past year for Clinton, about whose potential 2016 bid there is wide speculation. Fifty-six percent viewed the former first lady favorably in Fox News’s previous poll, conducted in June 2013.

Meanwhile, President Barack Obama’s approval ratings have remained consistent, as 45 percent view him favorably and 51 percent view him unfavorably. This is a 1 percentage point change from his 46/52 favorability split in 2013.

Clinton also continues to lead possible primary challengers among Democratic voters: Sixty-nine percent said she is their preferred choice for the party’s nomination. Vice President Joe Biden came a distant second with 14 percent. However, Christie tops the list of possible GOP candidates with only 15 percent of Republican support. Trailing closely are Bush and Paul, each of whom garnered 14 percent.

The Fox News poll was conducted April 13-15 and surveyed 1,012 registered voters. It has a margin of error of plus or minus 3 percentage points.